causing us to think in the united states about a rebalancing of priorities, in a certain sense. if you look at the political debate going on right now, it is all about the economy. that is a new era that we are in, and there's a lot of opportunity to have discussions about how north america as a region, and the competitiveness of north america as a region, can be one of the building blocks of the economy for the next century. to get there, one of the many things that need to be addressed, structural reforms in the u.s. and mexico, one of the things is clearly border management. it certainly can be a driving force for some of the changes in policies that have been discussed today. >> big, historical changes take generations.